ARDFTSRC – Real Discrete Fourier Transform Sample Rate Conversion (in: DSP and Plugin Devel…)
By: signalsmith
8 Nov 22:25
Just read through the Python and C ports. It looks like a 50%-overlap STFT, with the block size chosen so that you can add/remove bins in the frequency-domain to get the appropriate-sized output spectrum.
That approach depends heavily on being able to use arbitrary FFT sizes, which means that porting it to some FFT libraries can end up slow – much slower than one might expect when comparing the fast sizes of each implementation. The author seems pretty dismissive of this, and I’m not sure tha…
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